lto-compress.cc File Reference

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "tree.h"
#include "gimple.h"
#include "cgraph.h"
#include "lto-streamer.h"
#include <zlib.h>
#include "lto-compress.h"
#include "timevar.h"

Include dependency graph for lto-compress.cc:

Data Structures
struct	lto_compression_stream

Functions
static void *	lto_zalloc (void *opaque, unsigned items, unsigned size)
static void	lto_zfree (void *opaque, void *address)
static int	lto_normalized_zlib_level (void)
static void	lto_destroy_compression_stream (struct lto_compression_stream *stream)
static struct lto_compression_stream *	lto_new_compression_stream (void(*callback)(const char *, unsigned, void *), void *opaque, bool is_compression)
static void	lto_append_to_compression_stream (struct lto_compression_stream *stream, const char *base, size_t num_chars)
struct lto_compression_stream *	lto_start_compression (void(*callback)(const char *, unsigned, void *), void *opaque)
void	lto_compress_block (struct lto_compression_stream *stream, const char *base, size_t num_chars)
static void	lto_compression_zlib (struct lto_compression_stream *stream)
void	lto_end_compression (struct lto_compression_stream *stream)
struct lto_compression_stream *	lto_start_uncompression (void(*callback)(const char *, unsigned, void *), void *opaque)
void	lto_uncompress_block (struct lto_compression_stream *stream, const char *base, size_t num_chars)
static void	lto_uncompression_zlib (struct lto_compression_stream *stream)
void	lto_end_uncompression (struct lto_compression_stream *stream, lto_compression compression)

Variables
static const size_t	Z_BUFFER_LENGTH = 4096
static const size_t	MIN_STREAM_ALLOCATION = 1024

Function Documentation

lto_append_to_compression_stream()

static void lto_append_to_compression_stream ( struct lto_compression_stream * stream, const char * base, size_t num_chars )

static

Append NUM_CHARS from address BASE to STREAM.   

References lto_compression_stream::allocation, lto_compression_stream::buffer, lto_compression_stream::bytes, ggc_alloc(), and MIN_STREAM_ALLOCATION.

Referenced by lto_compress_block(), and lto_uncompress_block().

lto_compress_block()

void lto_compress_block	(	struct lto_compression_stream *	stream,
		const char *	base,
		size_t	num_chars )

Append NUM_CHARS from address BASE to STREAM.   

References gcc_assert, ggc_alloc(), lto_compression_stream::is_compression, lto_append_to_compression_stream(), lto_stats, and lto_stats_d::num_output_il_bytes.

Referenced by lto_write_data(), and lto_write_stream().

lto_compression_zlib()

static void lto_compression_zlib ( struct lto_compression_stream * stream )

static

References lto_compression_stream::buffer, lto_compression_stream::bytes, lto_compression_stream::callback, free(), gcc_assert, ggc_alloc(), internal_error(), lto_compression_stream::is_compression, lto_destroy_compression_stream(), lto_normalized_zlib_level(), lto_stats, lto_zalloc(), lto_zfree(), lto_stats_d::num_compressed_il_bytes, lto_compression_stream::opaque, timevar_pop(), timevar_push(), and Z_BUFFER_LENGTH.

Referenced by lto_end_compression().

lto_destroy_compression_stream()

static void lto_destroy_compression_stream ( struct lto_compression_stream * stream )

static

Free the buffer and memory associated with STREAM.   

References lto_compression_stream::buffer, and free().

Referenced by lto_compression_zlib(), and lto_uncompression_zlib().

lto_end_compression()

void lto_end_compression

(

struct lto_compression_stream *

stream

)

References ggc_alloc(), and lto_compression_zlib().

Referenced by lto_end_section().

lto_end_uncompression()

void lto_end_uncompression	(	struct lto_compression_stream *	stream,
		lto_compression	compression )

References fatal_error(), ggc_alloc(), lto_uncompression_zlib(), UNKNOWN_LOCATION, and ZSTD.

Referenced by lto_get_section_data().

lto_new_compression_stream()

static struct lto_compression_stream * lto_new_compression_stream ( void(*)(const char *, unsigned, void *) callback, void * opaque, bool is_compression )

static

Create a new compression stream, with CALLBACK flush function passed
OPAQUE token, IS_COMPRESSION indicates if compressing or uncompressing.   

References lto_compression_stream::callback, ggc_alloc(), lto_compression_stream::is_compression, and lto_compression_stream::opaque.

Referenced by lto_start_compression(), and lto_start_uncompression().

lto_normalized_zlib_level()

static int lto_normalized_zlib_level ( void )

static

Return a zlib compression level that zlib will not reject.  Normalizes
the compression level from the command line flag, clamping non-default
values to the appropriate end of their valid range.   

References ggc_alloc().

Referenced by lto_compression_zlib().

lto_start_compression()

struct lto_compression_stream * lto_start_compression	(	void(*)(const char *, unsigned, void *)	callback,
		void *	opaque )

Return a new compression stream, with CALLBACK flush function passed
OPAQUE token.   

References lto_compression_stream::callback, lto_new_compression_stream(), and lto_compression_stream::opaque.

Referenced by lto_begin_section().

lto_start_uncompression()

struct lto_compression_stream * lto_start_uncompression	(	void(*)(const char *, unsigned, void *)	callback,
		void *	opaque )

Return a new uncompression stream, with CALLBACK flush function passed
OPAQUE token.   

References lto_compression_stream::callback, lto_new_compression_stream(), and lto_compression_stream::opaque.

Referenced by lto_get_section_data().

lto_uncompress_block()

void lto_uncompress_block	(	struct lto_compression_stream *	stream,
		const char *	base,
		size_t	num_chars )

Append NUM_CHARS from address BASE to STREAM.   

References gcc_assert, ggc_alloc(), lto_compression_stream::is_compression, lto_append_to_compression_stream(), lto_stats, and lto_stats_d::num_input_il_bytes.

Referenced by lto_get_section_data().

lto_uncompression_zlib()

static void lto_uncompression_zlib ( struct lto_compression_stream * stream )

static

References lto_compression_stream::buffer, lto_compression_stream::bytes, lto_compression_stream::callback, free(), gcc_assert, ggc_alloc(), internal_error(), lto_compression_stream::is_compression, lto_destroy_compression_stream(), lto_stats, lto_zalloc(), lto_zfree(), lto_stats_d::num_uncompressed_il_bytes, lto_compression_stream::opaque, timevar_pop(), timevar_push(), and Z_BUFFER_LENGTH.

Referenced by lto_end_uncompression().

lto_zalloc()

static void * lto_zalloc ( void * opaque, unsigned items, unsigned size )

static

For zlib, allocate SIZE count of ITEMS and return the address, OPAQUE
is unused.   

References gcc_assert, and ggc_alloc().

Referenced by lto_compression_zlib(), and lto_uncompression_zlib().

lto_zfree()

static void lto_zfree ( void * opaque, void * address )

static

For zlib, free memory at ADDRESS, OPAQUE is unused.   

References free(), gcc_assert, and ggc_alloc().

Referenced by lto_compression_zlib(), and lto_uncompression_zlib().

Variable Documentation

MIN_STREAM_ALLOCATION

const size_t MIN_STREAM_ALLOCATION = 1024

static

Referenced by lto_append_to_compression_stream().

Z_BUFFER_LENGTH

const size_t Z_BUFFER_LENGTH = 4096

static

Overall compression constants for zlib.   

Referenced by lto_compression_zlib(), and lto_uncompression_zlib().